Phylogenetic placement of two enigmatic genera, Borthwickia and Stixis, based on molecular and pollen data, and the description of a new family of Brassicales, Borthwickiaceae

	Phylogenetic placement of two enigmatic genera, Borthwickia and Stixis, based on molecular and pollen data, and the description of a new family of Brassicales, Borthwickiaceae
	Su, Jun-Xia ; Wang, Wei ; Zhang, Li-Bing ; Chen, Zhi-Duan
刊名	TAXON
	2012
卷号	61 期号:3 页码:601-611
关键词	Borthwickia Borthwickiaceae Brassicales Capparaceae phylogeny pollen morphology Stixis
ISSN号	0040-0262
通讯作者	Chen, ZD (reprint author), Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China.
产权排序	4
英文摘要	Capparaceae (Brassicales) as traditionally circumscribed is heterogeneous, and several genera have been segregated from it based on molecular and/or morphological data. However, Borthwickia and Stixis, two Southeast Asian endemic genera of Capparaceae with controversial positions, have not previously been evaluated in a molecular phylogenetic study. Here, we used four plastid DNA regions (matK, ndhF, rbcL, trnL-trnF) and pollen data to determine their phylogenetic relationships within core Brassicales. Our results showed that neither Borthwickia nor Stixis is a member of Capparaceae. The two genera, together with Forchhammeria, Gyrostemonaceae, Resedaceae, and Tirania, formed a clade with strong support. Stixis is closely related to Tirania, a relationship that is also supported by morphological characters, such as six sepals and three- or four-locular ovaries. Most interestingly, Borthwickia was resolved as sister to the Forchhammeria-Resedaceae-Stixis-Tirania clade with moderate to strong support. However, Borthwickia differs markedly from its sister group in having opposite leaves, one indistinct stigma, more than four carpels and locules, a linear ovary with ridges, and pollen grains with perforate exine sculpturing. Thus, we describe a new family, Borthwickiaceae, for the genus.
学科主题	Plant Sciences; Evolutionary Biology
收录类别	SCI
资助信息	National Natural Science Foundation of China [40830209, 31061160184]; CAS [2011T1S24]
语种	英语
WOS记录号	WOS:000305439100009
公开日期	2013-07-03
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/23824]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Su, Jun-Xia,Wang, Wei,Zhang, Li-Bing,et al. Phylogenetic placement of two enigmatic genera, Borthwickia and Stixis, based on molecular and pollen data, and the description of a new family of Brassicales, Borthwickiaceae[J]. TAXON,2012,61(3):601-611.
APA	Su, Jun-Xia,Wang, Wei,Zhang, Li-Bing,&Chen, Zhi-Duan.(2012).Phylogenetic placement of two enigmatic genera, Borthwickia and Stixis, based on molecular and pollen data, and the description of a new family of Brassicales, Borthwickiaceae.TAXON,61(3),601-611.
MLA	Su, Jun-Xia,et al."Phylogenetic placement of two enigmatic genera, Borthwickia and Stixis, based on molecular and pollen data, and the description of a new family of Brassicales, Borthwickiaceae".TAXON 61.3(2012):601-611.